Lamp-holder.



H. S. KNERR.

LAMP HOLDER.

APPLICATION FILED MAR. 5, 1914v LWSHWK Patented 'Jan. 5, 1915.

w vbmeooeo HERBERT 5. KNERR.

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LAMP-HOLDER.

application filed March 5, 191%. Serial No. 822,557.

To aZ-lmrhom it may concern:

1&8 it known that T, HERBERT S. KNERR, a citizen of the United States,residing at Dayton. in the county of Montgomery and State'of Ohio, haveinvented certain new and useful Improvements in Lamp-Holders and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains. to make and use the same, reference being had: to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form. a part of this specification.

This invention relates to new and, useful improvements in adjustableholders for incandescent lamps.

One object of the invention is to provide a device of the above typewhich is simple in construction and easily adjusted.

Another object of the invention is to provide a lamp bracket in whichthe axes of the various parts thereof may be adjusted to any anglerelative to each other and which may be held in said adjusted positionsby the aid of a single clamping member.

Referring to the accompanying drawings. Figure v1 is a side elevation ofmy improved lamp holder: Fig. 2 is a section on the line 'aa of Fig. 1;Fig. 3 is a section approximately on the line b--b of Fig. 2; Fig. 4 isa section on the line cc of Fig. 3; Fig. 5 is a plan view of the lampsocket clamping member; Fig. 6 is aview similar to Fig. 3

showing a modified construction; and Fig.

7 is a detail perspective view of an'intervening plate used in theconstruction shown in Fig. 6. v

In the specification and drawings, similar reference characters indicatecorresponding arts. p Referring more particularly to the drawings, 1represents the well known incandescent lamp mounted in a socket 2 andprovided with a shade 3. The socket2 is adapted to be engaged by aclamping member consisting of a loop 4 which extends from parallelmembers 5. The parallel members 5 are provided with eyelets 6 whichreceive a bolt 7 having a thumb-nut S. Said bolt 7 extends through aneyelet 9 on the end of a rod 1.0. Said rod 10 is slidably mounted in andextends through a slot 11 in a bolt 12 provided with a head 13, and issuspended from a standard or supporting mem- Specificatioh of LettersPatent.

P entedd an. 5., rain.

her 1% through the 'agency of a clamp. The clamp consists of a. strap 15which snrrounds the standard 14 on one side and is provided withprojections 16 adapted to engage the head 13 of the bolt. The clamp alsoconsists of a box 17 having a suitable opening through which the bolt 12extends and which is adapted to engage the standard 1i on the sideopposite the strap t5. The rod 10 lies. in the slot 11 between the box17 and a washer 18' mounted on the bolt 12. Said bolt 12 is providedwith a screwthreaded hand wheel 19 adapted to engage the washer 18. Whenthe hand wheel 19 is tightened on the bolt 12, the washer 18and the rod11 will be thrust in the direction of the standard 14 while the box 17will be thrust in the same direction and will be clamped against saidstandard, and the strap 15 and the bolt 12 will be thrust in an oppositedirection thereby firmly holding the rod 10 in any position to which itmay be adjusted. It will be noted that by thus constructing a clamp therelative angles between the axes of the standard 14,,the bolt 12 and therod 10 may be universally adjusted by means of a single clamping member,consequently, the. lamp 1 may be placed in any position. In addition toadjusting the relative angles between the various parts, the height ofthe lamp may be adusted by moving the clamp along the standard 1.4,while the distance the lamp is removed from the standard 14 may beadjusted by moving the rod 10 through the slot 11. It will, therefore,be seen that five different adjustments may be secured by the aid of asingle clamping member. The position of the lamp 1 may be furtheradjusted by. the aid of the bolt 7 at the end of the rod 10. In somecases it is desirable that the lamp may be swung in a horizontal planearound the standard 14 without elevating or lowering the lamp or varyingits distance from the standard 14. In this case an apertured plate 20,shown in detail in Fig. 7 is provided. The plate 20 is interposedbetween the projections 16 and the box 17, as is shown in: Fig. 6. Saidplate 20 is of a thickness suflicient to prevent the box 17 engaging thestandard 14 which permits the clamp to freely rotate on the standard.Said plate 20, however. does not prevent the rod 10 being clampedbetween the washer 18 and the box 17. The lamp will, therefore, when theplate 20 is used, be main- Whatever position it may be swung to aroundthe standard 14:. When the plate 20 is used, the clamp and the partssupported thereby, are suspended'from the standard' 14 by the aid of acollar or head 21 on the lower end of the standard 14, it beingcontemplated that the standardll will be suspended vertically from abovewhen the plate 20 is utilized. The collar 21 acts as a bearing for theclamp and prevents the clamp falling off of the standard it. While inthe drawings I have shown the standard 14 as suspended from above, it isto be understood that when the clamp is used, as is shown in Figs.'1, 2-and 3, the said standard may be suspended or supported in any position,either from above, from below,

mounted horizontally from the wall, or may be placed at any angle.

Having described my-invention, I claim: 1. In a lamp holder, asupporting member, a strap engagingsaid supporting member on one side, abox mounted on the other side of said supporting member and inclosingthe adjacent sides of said strap, a bolt extending through said box andthe'head of which is in engagement with said strap, a hand wheel havinga screw-threaded engagement with said bolt, and a lamp-supporting rodprojecting through said bolt between the axis of the hand wheel and theaxis of the box, substantially as specified.

2. In a lamp holder, a supporting mem ber, a strap engaging saidsupporting member and having laterally extended sides the ends -'ofwhich terminate in angular projections, a bolt the head of which engagessaid angular projections, said bolt having an opening between the headand the screwthreaded portion thereof, a box inclosing the sideextensions of said strap and through which said bolt projects, a handWheel engaging said bolt, and a lamp-supporting arm extending throughthe opening in said bolt, substantially as specified.

In testimony whereof I atfix my signature, in presence of two witnesses.

HERBERT S. KNERR. VflLIlG-SSBSZ MELLIE GALLowAY, ldA'rtrHnw SIEBLER.

